<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <div v-bind:style="{ border: borderStyle, color: red }">内容</div>

    <div v-bind:style="[ boxObj, testObj ]">数组</div>
  </div>
  <script src="./vue.js"></script>

  <script>
    new Vue({
      el: '#app',
      data: {
        borderStyle: '20px solid pink',
        red: 'green',
        boxObj: {
          color: 'pink'
        },
        testObj: {
          fontSize: '50px'
        }
      }
    })
  </script>
</body>
</html>